CN114870632B - Coupling film for improving decoloration rate of printing and dyeing wastewater and preparation method thereof - Google Patents
Coupling film for improving decoloration rate of printing and dyeing wastewater and preparation method thereof Download PDFInfo
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- CN114870632B CN114870632B CN202210514417.4A CN202210514417A CN114870632B CN 114870632 B CN114870632 B CN 114870632B CN 202210514417 A CN202210514417 A CN 202210514417A CN 114870632 B CN114870632 B CN 114870632B
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- 230000008878 coupling Effects 0.000 title claims abstract description 40
- 238000010168 coupling process Methods 0.000 title claims abstract description 40
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 40
- 239000002351 wastewater Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 238000007639 printing Methods 0.000 title abstract description 9
- 238000004043 dyeing Methods 0.000 title abstract description 8
- 229920006254 polymer film Polymers 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 230000005684 electric field Effects 0.000 claims abstract description 9
- 239000012528 membrane Substances 0.000 claims description 23
- 239000000243 solution Substances 0.000 claims description 12
- 239000002131 composite material Substances 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 5
- 238000000967 suction filtration Methods 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims 1
- 230000014759 maintenance of location Effects 0.000 abstract description 6
- 238000005273 aeration Methods 0.000 abstract description 3
- 239000000975 dye Substances 0.000 description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000004907 flux Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004042 decolorization Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 239000003153 chemical reaction reagent Substances 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000001728 nano-filtration Methods 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- 150000003624 transition metals Chemical class 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010170 biological method Methods 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000015271 coagulation Effects 0.000 description 1
- 238000005345 coagulation Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 231100000243 mutagenic effect Toxicity 0.000 description 1
- 230000003505 mutagenic effect Effects 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000029553 photosynthesis Effects 0.000 description 1
- 238000010672 photosynthesis Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920005597 polymer membrane Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 229910021642 ultra pure water Inorganic materials 0.000 description 1
- 239000012498 ultrapure water Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/18—Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/027—Nanofiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/145—Ultrafiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/14—Ultrafiltration; Microfiltration
- B01D61/20—Accessories; Auxiliary operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/42—Electrodialysis; Electro-osmosis ; Electro-ultrafiltration; Membrane capacitive deionization
- B01D61/425—Electro-ultrafiltration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
- B01D69/12—Composite membranes; Ultra-thin membranes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/308—Dyes; Colorants; Fluorescent agents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Urology & Nephrology (AREA)
- Nanotechnology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a coupling film for improving the decoloration rate of printing and dyeing wastewater, which is characterized in that a conductive filter layer is arranged on a polymer film, micro aeration in film holes is realized through a coupling electric field, and the film holes are extruded by bubbles, so that the retention rate of dye molecules is improved. The invention also relates to a preparation method of the coupling film, which is characterized in that a first conductive filter layer and a second conductive filter layer are respectively formed on the upper surface and the lower surface of the polymer film to prepare the coupling film. The invention also relates to a decoloring method of the dye wastewater, the coupling film is connected with the electric field to obtain a coupling film system, and the coupling film system is used for filtering the dye wastewater.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a coupling film for improving the decolorizing rate of printing and dyeing wastewater, a preparation method thereof and a decolorizing method of dye wastewater.
Background
With the progress of industrial technology, printing and dyeing wastewater has become an important pollution source which cannot be ignored in the water pollution phenomenon. It is reported that approximately 10-20% of the dye is discharged from the remaining liquid produced due to imperfect treatment and cleaning techniques in the printing industry. These dyes not only severely affect water quality, exhibit color changes, and inhibit sunlight from entering the body of water, thereby reducing photosynthesis of aquatic organisms, many dyes are toxic, and some of them have carcinogenic and mutagenic properties. Therefore, the removal of dye pollutants in water is of great importance to the environment.
There are many physical, chemical and biological methods for treating dyes in printing and dyeing wastewater to decolorize, including adsorption, coagulation and sedimentation, aerobic and anaerobic microbial degradation. But has the problems of harsh degradation conditions, complex preparation process, high price, long period, poor cyclic regeneration capability and the like in actual use.
Therefore, there is a need to develop a membrane having a high decolorization rate of printing wastewater and a simple decolorization method.
Disclosure of Invention
The first aspect of the invention aims at solving a series of problems existing in the conventional dyeing wastewater decolorization method, and provides a coupling membrane, which is formed by arranging a conductive filter layer on a polymer membrane, and then realizing micro-aeration in a membrane hole by a coupling electric field, wherein the membrane hole is extruded by bubbles, so that the retention rate of dye molecules is improved.
The second aspect of the invention is to provide a method for preparing the coupling film.
The third aspect of the invention is to provide a method for decoloring dye wastewater, which uses the prepared coupling film to connect with an electric field, wherein the rejection rate of the obtained coupling film system to dye is up to 98.02%, and the water flux is up to 38.39 Kg/square meter/h. Simultaneously has the flux of the ultrafiltration membrane and the interception effect of the nanofiltration membrane.
In order to achieve the above object, the present invention provides the following technical solutions.
The present invention provides a coupling film comprising:
the polymer film is formed from a polymer film,
a first conductive filter layer disposed on an upper surface of the polymer film; and
and a second conductive filter layer disposed on a lower surface of the polymer film.
Preferably, the first conductive filter layer and the second conductive filter layer are both MXene.
MXene is a class of two-dimensional inorganic compounds. This consists of a transition metal carbide, nitride or carbonitride of several atomic layer thicknesses. The surface of the MXene material is provided with hydroxyl groups or terminal oxygen, so that the MXene material has the metal conductivity of transition metal carbide. MXene has excellent filtering performance.
Preferably, the first and second conductive filter layers are adsorbed on the polymer film.
The second aspect of the present invention provides a method for preparing the coupling film, comprising:
a first conductive filter layer and a second conductive filter layer are formed on the upper and lower surfaces of the polymer film, respectively.
Preferably, the preparation method further comprises: preparing an MXene solution; immersing the polymer film in the MXene solution to obtain a composite film with a sandwich structure; and filtering the MXene solution by using the composite membrane, and drying to obtain the coupling membrane.
Preferably, the MXene solution is an aqueous MXene solution.
Preferably, the concentration of the MXene solution is 0.5-5g/L, preferably 0.5-2g/L.
Preferably, the polymer film is immersed in the MXene solution and then oscillated.
Preferably, the shaking time is 8-20 hours, preferably 10-15 hours. Preferably, the oscillation temperature is 20-30 ℃.
Preferably, the filtration is suction filtration. Preferably, the filtration time is 1 to 10min, preferably 3 to 7min.
Preferably, the drying temperature is 50-80 ℃, preferably 60-70 ℃.
The third aspect of the present invention provides a method for decolorizing dye wastewater, comprising:
connecting the coupling film with an electric field to obtain a coupling film system;
and filtering the dye wastewater by using the coupling membrane system.
When the coupling membrane system is used for filtering dye wastewater, hydrogen evolution reaction occurs in membrane holes to generate a large number of bubbles, and the bubbles squeeze the membrane holes, so that the dye retention rate is improved to 98.02%, and the water flux is up to 38.39 Kg/square meter/h.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention provides a coupling film, which is characterized in that a conductive filter layer is arranged on a polymer film, micro aeration in film holes is realized through a coupling electric field, and the film holes are extruded by bubbles, so that the rejection rate of dye molecules is improved.
2. The invention also provides a decoloring method of the dye wastewater, which connects the coupling film with an electric field, wherein the rejection rate of the prepared coupling film system to the dye is up to 98.02%, and the water flux is up to 38.39 Kg/square meter/h. Simultaneously has the flux of the ultrafiltration membrane and the interception effect of the nanofiltration membrane.
3. The decoloring method of the dye wastewater has the advantages of low cost, simple and convenient operation, low industrial conversion difficulty and strong universality on dye interception, and has important significance in the aspect of treating the printing and dyeing wastewater.
Drawings
Fig. 1 is an electron microscope scan of the surface and cross section of a prepared coupling film of the present invention.
FIG. 2 is a graph showing the effect of dye retention rate on decolorizing dye wastewater using the coupling membrane system prepared by the present invention.
Detailed Description
In order to make the contents of the present invention more easily understood, the technical scheme of the present invention will be further described with reference to the specific embodiments, but the present invention is not limited thereto. All techniques implemented based on the above description of the invention are intended to be included within the scope of the invention. Unless otherwise indicated, the raw materials and reagents used in the examples were all commercially available. The reagents, instruments or procedures not described herein are those routinely determinable by one of ordinary skill in the art.
Example 1:
(1) An aqueous solution of MXene was prepared by dissolving MXene in ultrapure water, and the dispersibility of MXene was further promoted by adjusting the pH.
(2) And immersing the polymer film into an MXene solution (1 g/L), and keeping the temperature of 20-30 ℃ for oscillating reaction for 12 hours to obtain the preliminarily modified composite film with the sandwich structure.
(3) And (3) mounting the composite membrane on a sand rate funnel, carrying out suction filtration on the MXene solution by using the composite membrane, keeping the suction filtration for 5min, and then drying at 60 ℃ to obtain the stable coupling membrane. An electron microscope scan of the surface and cross section of the prepared coupling film is shown in fig. 1.
(4) And connecting the prepared coupling film with an electric field to finally obtain the coupling film system.
Performance testing
The coupling membrane system prepared in example 1 was used to filter fuel wastewater for testing including water flux measurement, dye retention measurement.
Through testing, the rejection rate of the coupling film system to dye is as high as 98.02%. The dye retention effect of the prepared coupled membrane system is shown in figure 2.
Through test, the water flux is up to 38.39 Kg/square meter/h.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (2)
1. A coupling film, comprising:
the polymer film is formed from a polymer film,
a first conductive filter layer disposed on an upper surface of the polymer film; and
a second conductive filter layer disposed on a lower surface of the polymer film; the first conductive filter layer and the second conductive filter layer are adsorbed on the polymer film, and the first conductive filter layer and the second conductive filter layer are both MXene;
the preparation method of the coupling film comprises the following steps: forming a first conductive filter layer and a second conductive filter layer on the upper and lower surfaces of the polymer film, respectively; the method specifically comprises the following steps:
preparing an aqueous solution of MXene;
soaking the polymer film in the MXene solution, and oscillating to obtain a composite film with a sandwich structure; and
filtering the MXene solution by using the composite membrane, and drying to obtain a coupling membrane; wherein the filtration is suction filtration, and the drying temperature is 50-80 ℃.
2. A method for decolorizing dye wastewater, comprising:
connecting the coupling film of claim 1 with an electric field to obtain a coupling film system;
and filtering the dye wastewater by using the coupling membrane system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210514417.4A CN114870632B (en) | 2022-05-12 | 2022-05-12 | Coupling film for improving decoloration rate of printing and dyeing wastewater and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210514417.4A CN114870632B (en) | 2022-05-12 | 2022-05-12 | Coupling film for improving decoloration rate of printing and dyeing wastewater and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114870632A CN114870632A (en) | 2022-08-09 |
| CN114870632B true CN114870632B (en) | 2024-02-20 |
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| CN202210514417.4A Active CN114870632B (en) | 2022-05-12 | 2022-05-12 | Coupling film for improving decoloration rate of printing and dyeing wastewater and preparation method thereof |
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| CN (1) | CN114870632B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2411068C2 (en) * | 2009-01-26 | 2011-02-10 | Закрытое акционерное общество "Булыжев. Промышленные экосистемы" | Method of fluid filtration through homogeneous and composite membranes and device to this end |
| CN103801274A (en) * | 2014-02-28 | 2014-05-21 | 天津工业大学 | Preparation method of oil-absorbing hollow fiber porous membrane |
| CN110573559A (en) * | 2017-04-27 | 2019-12-13 | 可隆工业株式会社 | Ion exchange membrane, method of manufacturing the same, and energy storage device including the same |
| CN112473372A (en) * | 2020-12-07 | 2021-03-12 | 江南大学 | Conductive forward osmosis membrane and preparation method thereof |
| CN113979778A (en) * | 2021-12-09 | 2022-01-28 | 广西碧清源环保投资有限公司 | Ceramic filtering membrane with pyroelectric function and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200402782A1 (en) * | 2019-06-19 | 2020-12-24 | The Regents Of The University Of California | Ratchet-based ion pumping membrane systems |
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2022
- 2022-05-12 CN CN202210514417.4A patent/CN114870632B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2411068C2 (en) * | 2009-01-26 | 2011-02-10 | Закрытое акционерное общество "Булыжев. Промышленные экосистемы" | Method of fluid filtration through homogeneous and composite membranes and device to this end |
| CN103801274A (en) * | 2014-02-28 | 2014-05-21 | 天津工业大学 | Preparation method of oil-absorbing hollow fiber porous membrane |
| CN110573559A (en) * | 2017-04-27 | 2019-12-13 | 可隆工业株式会社 | Ion exchange membrane, method of manufacturing the same, and energy storage device including the same |
| CN112473372A (en) * | 2020-12-07 | 2021-03-12 | 江南大学 | Conductive forward osmosis membrane and preparation method thereof |
| CN113979778A (en) * | 2021-12-09 | 2022-01-28 | 广西碧清源环保投资有限公司 | Ceramic filtering membrane with pyroelectric function and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| Voltage Gated Ions Sieving Through 2D MXene Ti3C2Tx Membranes;Chang E. Ren 等;《ACS Applied Nano Materials》;20180621;第1卷(第7期);3644-3652 * |
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